PROPERTY, PLANT AND EQUIPMENT. (Details) - USD ($)	Dec. 26, 2015	Dec. 27, 2014
Property, Plant and Equipment
Property, plant and equipment, at cost	$ 93,302,248	$ 95,234,129
Less, accumulated depreciation and amortization	47,115,884	48,308,595
Property, plant and equipment, net	46,186,364	46,925,534
Land
Property, Plant and Equipment
Property, plant and equipment, at cost	3,746,093	4,099,790
Land improvements
Property, Plant and Equipment
Property, plant and equipment, at cost	7,242,766	7,415,255
Buildings
Property, Plant and Equipment
Property, plant and equipment, at cost	45,097,638	44,260,627
Machinery and equipment
Property, Plant and Equipment
Property, plant and equipment, at cost	$ 37,215,751	$ 39,458,457